Plasma Transferred Arc deposition of powdered high performances alloys: process parameters optimisation as a function of alloy and geometrical configuration

This study aimed to compare the X3CrNiMo17-13-3 stainless steel based plasma transferred arc (PTA) cladded hardfacings, reinforced with the in-situ synthesized Cr and Ti carbides. Carbon black and either pure Cr, pure Ti, or TiO2 were utilized as reinforcement precursors (the respective hardfacings are further referred to as Cr+C, Ti+C and TiO2+C). The pre-placed mixtures of matrix and reinforcement precursor powders were remelted by the plasma transferred arc, applying the preliminarily optimized process parameters (95 A, 22 – 24 V, 0.2 mm/s). As a reference, the unreinforced stainless steel hardfacing was used. The carbide reinforcement was successfully in-situ synthesized in all the hardfacings. The Cr + C hardfacing exhibited the largest average hardness (556 ± 29 HV1), while the TiO2 + C hardfacing had the largest average Young’s modulus (156.3 ± 19.7 GPa). The Cr + C and Ti + C hardfacings demonstrated the 2.3 and 2.1 times higher resistance to abrasive wear than the reference hardfacing. The TiO2 + C hardfacing showed 1.5 times lower wear resistance than the reference hardfacing presumably due to a lack of the reinforcement and a lower strain hardening ability.

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Enhancement of Deposition Quality in Micro-plasma Transferred Arc Deposition Process

Materials and Manufacturing Processes ◽

10.1080/10426914.2014.892984 ◽

2014 ◽

Vol 29 (8) ◽

pp. 1017-1023 ◽

Cited By ~ 11

Author(s):

Suyog Jhavar ◽

N. K. Jain ◽

C. P. Paul

Keyword(s):

Deposition Process ◽

Plasma Transferred Arc ◽

Transferred Arc ◽

Arc Deposition

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Finite Element Simulation of Pre-Heating Effect on Melt Pool Size During Micro-Plasma Transferred Arc Deposition Process

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/389/1/012006 ◽

2018 ◽

Vol 389 ◽

pp. 012006 ◽

Cited By ~ 1

Author(s):

Sagar H Nikam ◽

Neelesh K Jain

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Deposition Process ◽

Heating Effect ◽

Melt Pool ◽

Plasma Transferred Arc ◽

Element Simulation ◽

Transferred Arc ◽

Melt Pool Size ◽

Arc Deposition

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Influence of Plasma Transferred Arc Process Parameters on Structure and Mechanical Properties of Wear Resistive NiCrBSi-WC/Co Coatings

Materials Science ◽

10.5755/j01.ms.17.2.482 ◽

1970 ◽

Vol 17 (2) ◽

pp. 140-144 ◽

Cited By ~ 3

Author(s):

Eitvydas GRUZDYS ◽

Šarūnas MEŠKINIS

Keyword(s):

Mechanical Properties ◽

Abrasive Wear ◽

Process Parameters ◽

Gas Flow ◽

Elevated Temperatures ◽

Arc Discharge ◽

Flame Spray ◽

Plasma Parameters ◽

Plasma Transferred Arc ◽

Transferred Arc

Self-fluxing NiCrBSi and related coatings received considerable interest due to their good wear as well as corrosion resistance at moderate and elevated temperatures. Hard tungsten carbide (WC) particles can be included in NiCrBSi for further increase of the coating hardness and abrasive wear resistance. Flame spray technique is widely used for fabrication of NiCrBSi films. However, in such a case, subsequent remelting of the deposited coatings by flame, arc discharge or high power laser beam is necessary. In present study NiCrBSi-WC/Co coatings were formed using plasma transferred arc process. By adjusting plasma parameters, such as current, plasma gas flow, shielding gas flow, a number of coatings were formed on steel substrates. Structure of the coatings was investigated using X-ray diffractometry. Microstructure of cross-sectioned coatings was examined using scanning electron microscopy. Hardness of the coating was evaluated by means of the Vickers hardness tests. Wear tests were also performed on specimens to determine resistance to abrasive wear. Acquired results allowed estimating the influence of the deposition process parameters on structure and mechanical properties of the coatings.http://dx.doi.org/10.5755/j01.ms.17.2.482

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